DD1&2 are going on the school trip to the theatre in a week or so's time. The theatre is in another town about 1/2 hours drive away, part of which is on the motorway. School are providing "proper" double deck buses IYSWIM from a hire company.
Now, both girls are under 135cm tall, so therefore really need to take their booster seats. However, although the buses do have seat belts, they are only lap type belts.
Is it safer to use their booster seats with a lap belt (which I know isn't recommended) or just use the seat belts without a booster? I'm not sure I like the sound of either choice really, so I'm open to all advice. TIA.